What option would you guys rather get if you could only get one on a 2002 325ci?

HK upgrade

OR

Xenon Lights

?????

I'd get the xenons and add an aftermarket subwoofer when you have the cash.

That's right Pod 13!!!

Here's the sccop: If you add the HK afterwards, you basically get new speakers..... 400-900 bucks. Thats the basic difference.
If you get the Xenon lights afterwards, its gonna be 2500-3500 bucks for modifications (rewire apparatus from computer, install ignitors, etc)..... if you can find anyone to do it. I've searched and searched for an installer for the bixenons and most BMW dealerships are hesitant. I would say, get the lights and throw a good pair of Boston Acoustics 6.5 Pro Series in. They're about 950 bucks but well worth it. leave the stock speakers in the back. Unless you're a sound freak, you won't know the difference.

Get the Xenon conversion kit first. Find a dealer in Germany
and you get ORIGINAL parts made by Hella for 500 Euros which are around 455 US$. At least our club gets it for this price.

Personally I got both, but if I had to choose, I'd say get the HK upgrade and put in $50 blue bulbs... produces very similar look to the zenons. Then again, my Home Theater cost almost as much as my car... so take what I say with a grain of salt.

-Mike

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2002 330Ci
Sport, Cold, HK, Zenon